（C）第一个Windows 32 API的窗口程序（

#include <windows.h> LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int ICmdShow) { static TCHAR szAppName[] = TEXT("windowOfC"); HWND hwnd;//窗体句柄变量 MSG msg;//消息变量 WNDCLASS wndclass;//窗口类变量 //配置窗口类结构 wndclass.style = CS_HREDRAW | CS_VREDRAW; wndclass.lpfnWndProc = WndProc; wndclass.cbClsExtra = 0; wndclass.cbWndExtra = 0; wndclass.hInstance = hInstance; wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION); wndclass.hCursor = LoadCursor(NULL, IDC_ARROW); wndclass.hbrBackground = (HBRUSH)COLOR_WINDOW; wndclass.lpszMenuName = NULL; wndclass.lpszClassName = szAppName; //注册窗口类 if (!RegisterClass(&wndclass)) { MessageBox(NULL, TEXT("注册窗口类失败！"), szAppName, MB_ICONERROR); return 0; } hwnd = CreateWindow(szAppName, TEXT("C语言调用Windows API创建的窗口"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL); ShowWindow(hwnd, ICmdShow); UpdateWindow(hwnd); while (GetMessage(&msg, NULL, 0, 0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return msg.wParam; }; //消息处理方法，windows操作系统的回调函数 LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { HDC hdc; PAINTSTRUCT ps; RECT rect; switch (message) { case WM_CREATE: MessageBox(NULL, TEXT("创建窗口了！"), NULL, MB_ICONERROR); return 0; case WM_PAINT: hdc = BeginPaint(hwnd, &ps); GetClientRect(hwnd, &rect); DrawText(hdc, TEXT("hello C windows "), -1, &rect, DT_SINGLELINE | DT_CENTER | DT_VCENTER); EndPaint(hwnd, &ps); return 0; case WM_DESTROY: PostQuitMessage(0); return 0; } return DefWindowProc(hwnd, message, wParam, lParam); };

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